The A190201 drill set contains 19 A100 drills of different metric diameters, all in a handy plastic case which makes selecting the required drill size very simple. The drills in the A190201 are Dormer?s A100 jobber drills with a conventional 118 degree split point which provides strength and means the point is easy to regrind. This makes it a very cost-effective drill. The A100 is suitable for both hand held and machine drilling in a number of applications and has a steam oxide finish which helps stop work piece material from sticking to the cutting edge of the drill. The A100 is suitable for drilling many materials including steels, aluminium and stainless steels. The patented silver ring on the Dormer A100 drills above 6.00 mm lets know this is a genuine Dormer drill and makes the drill size easier to spot. The A190201 drill set from Dormer is good for your metric drilling requirements. *Note: all drills below 1mm are bright.